DOI: 10.1007/s00531-013-0982-5
Scopus记录号: 2-s2.0-84896542704
论文题名: Fluid inclusion and H-O-C isotope geochemistry of the Yaochong porphyry Mo deposit in Dabie Shan, China: A case study of porphyry systems in continental collision orogens
作者: Wang P. ; Chen Y.-J. ; Fu B. ; Yang Y.-F. ; Mi M. ; Li Z.-L.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 3 起始页码: 777
结束页码: 797
语种: 英语
英文关键词: Continental collision orogen
; Dabie Shan
; Fluid inclusions
; Porphyry Mo deposit
; Stable isotopes
Scopus关键词: carbon isotope
; continental collision
; fluid inclusion
; hydrogen isotope
; igneous geochemistry
; molybdenum
; ore deposit
; orogeny
; oxygen isotope
; porphyry
; stable isotope
; terrane
; China
; Dabie Mountains
; Henan
; Xinxiang
英文摘要: The Yaochong porphyry Mo deposit in Xinxian County, Henan Province, China, is located in the Hong'an terrane, that is, the western part of the Dabie orogen. The Dabie orogen is part of a >1,500 km long, Triassic continental collision belt between the North China Block and the South China Block. Four types of vein are present. Paragenetically, from early to late, they are as follows: stage 1 quartz + K-feldspar ± pyrite ± magnetite vein; stage 2 quartz + K-feldspar + molybdenite ± pyrite vein; stage 3 quartz + polymetallic sulfides ± K-feldspar vein; and stage 4 quartz ± carbonate ± fluorite vein. Four compositional types of fluid inclusion, pure CO2, CO2 bearing, aqueous, and solid bearing, are present in quartz from the first three stages; only low-salinity aqueous fluid inclusions occur in quartz from the last stage. All the estimated salinities are ≤13.1 wt% NaCl eq., and no halite crystals were identified. Homogenization temperatures for the fluid inclusions from stages 1 to 4 are in the ranges of 262-501, 202-380, 168-345, and 128-286 °C, respectively, and estimated depths decrease from 6.9 to 8.9 km, through 6.2-7.2, to ~4.7 km. Quartz separates from the veins yielded a δ18O value of 7.7-11.2 ‰, corresponding to δ18OH2O values of -1.3 to 6.9 ‰ using temperature estimates from fluid inclusion data; δDH2O values of fluid inclusion vary from -80 to -55 ‰, and δ13CCO2 from -2.3 to 2.7 ‰, suggesting that the ore-fluids evolved from magmatic to meteoric sources. We conclude that the ore-forming fluid system at Yaochong was initially high temperature, high salinity, and CO2-rich and then progressively evolved to CO2-poor, lower salinity, and lower temperature, by mixing with meteoric water, which results in ore precipitation. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896542704&doi=10.1007%2fs00531-013-0982-5&partnerID=40&md5=f0bfdca3d68d0029aab48e438b9699cb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70394
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; Key Laboratory of Orogen and Crust Evolution, Peking University, Beijing, 100871, China; Research School of Earth Sciences, Australia National University, ACT, ACT, 2000, Australia; Henan Bureau of Geological Exploration for Non-Ferrous Metals, Zhengzhou, 450052, China
Recommended Citation:
Wang P.,Chen Y.-J.,Fu B.,et al. Fluid inclusion and H-O-C isotope geochemistry of the Yaochong porphyry Mo deposit in Dabie Shan, China: A case study of porphyry systems in continental collision orogens[J]. International Journal of Earth Sciences,2014-01-01,103(3)